- All sections
- C - Chemistrymetallurgy
- C01B - Non-metallic elementscompounds thereof
- C01B 7/04 - Preparation of chlorine from hydrogen chloride
Patent holdings for IPC class C01B 7/04
Total number of patents in this class: 164
10-year publication summary
|
7
|
6
|
8
|
4
|
7
|
5
|
8
|
8
|
3
|
4
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sumitomo Chemical Company, Limited | 9046 |
27 |
| Bayer MaterialScience AG | 743 |
24 |
| BASF SE | 21127 |
21 |
| Bayer Technology Services GmbH | 162 |
13 |
| Mitsui Chemicals, Inc. | 3216 |
11 |
| Covestro Deutschland AG | 2795 |
11 |
| Hanwha Solutions Corporation | 1018 |
9 |
| Wanhua Chemical Group Co., Ltd. | 366 |
7 |
| Bayer Intellectual Property GmbH | 2427 |
6 |
| Kronos International, Inc. | 112 |
3 |
| Covestro Intellectual Property GmbH & Co. KG | 276 |
3 |
| Arkema France | 4180 |
2 |
| Wanhua Chemical (Ningbo) Co., Ltd. | 81 |
2 |
| Xi'an Modern Chemistry Research Institute | 28 |
2 |
| Siemens AG | 24237 |
1 |
| The Regents of the University of California | 20473 |
1 |
| BASF AG | 138 |
1 |
| Dow Global Technologies LLC | 10744 |
1 |
| Akzo Nobel Chemicals International B.V. | 426 |
1 |
| Borsodchem Zrt. | 21 |
1 |
| Other owners | 17 |